Walter Rudolf Hess was a Swiss physiologist who won the Nobel Prize in Physiology or Medicine in 1949 for mapping the areas of the brain involved in the control of internal organs. He shared the prize with Egas Moniz. The Nobel Prize in Physiology or Medicine 1949, announced October 27, 1949. Walter Hess (1/2), “for his discovery of the functional organization of the interbrain as a coordinator of the activities of the internal organs”. Egas Moniz (1/2), “for his discovery of the therapeutic value of leucotomy in certain psychoses”. Walter Hess: born 1881, Frauenfeld, Switzerland. Egas Moniz: born 1874, Avanca, Portugal. Wiki link Wiki link Data: the Nobel Foundation (CC0).